drivers/scsi/fnic/fdls_fc.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 */

#ifndef _FDLS_FC_H_
#define _FDLS_FC_H_

/* This file contains the declarations for FC fabric services
 * and target discovery
 *
 * Request and Response for
 * 1. FLOGI
 * 2. PLOGI to Fabric Controller
 * 3. GPN_ID, GPN_FT
 * 4. RSCN
 * 5. PLOGI to Target
 * 6. PRLI to Target
 */

#include <scsi/scsi.h>
#include <scsi/fc/fc_els.h>
#include <uapi/scsi/fc/fc_fs.h>
#include <uapi/scsi/fc/fc_ns.h>
#include <uapi/scsi/fc/fc_gs.h>
#include <uapi/linux/if_ether.h>
#include <scsi/fc/fc_ms.h>
#include <linux/minmax.h>
#include <linux/if_ether.h>
#include <scsi/fc/fc_encaps.h>
#include <scsi/fc/fc_fcoe.h>

#define FDLS_MIN_FRAMES	(32)
#define FDLS_MIN_FRAME_ELEM	(4)
#define FNIC_FCP_SP_RD_XRDY_DIS 0x00000002
#define FNIC_FCP_SP_TARGET      0x00000010
#define FNIC_FCP_SP_INITIATOR   0x00000020
#define FNIC_FCP_SP_CONF_CMPL   0x00000080
#define FNIC_FCP_SP_RETRY       0x00000100

#define FNIC_FC_CONCUR_SEQS    (0xFF)
#define FNIC_FC_RO_INFO        (0x1F)

/* Little Endian */
#define FNIC_UNASSIGNED_OXID	(0xffff)
#define FNIC_UNASSIGNED_RXID	(0xffff)
#define FNIC_ELS_REQ_FCTL      (0x000029)
#define FNIC_ELS_REP_FCTL      (0x000099)

#define FNIC_FCP_RSP_FCTL      (0x000099)
#define FNIC_REQ_ABTS_FCTL     (0x000009)

#define FNIC_FC_PH_VER_HI      (0x20)
#define FNIC_FC_PH_VER_LO      (0x20)
#define FNIC_FC_PH_VER         (0x2020)
#define FNIC_FC_B2B_CREDIT     (0x0A)
#define FNIC_FC_B2B_RDF_SZ     (0x0800)

#define FNIC_LOGI_RDF_SIZE(_logi) ((_logi).fl_csp.sp_bb_data)
#define FNIC_LOGI_R_A_TOV(_logi) ((_logi).fl_csp.sp_r_a_tov)
#define FNIC_LOGI_E_D_TOV(_logi) ((_logi).fl_csp.sp_e_d_tov)
#define FNIC_LOGI_FEATURES(_logi) (be16_to_cpu((_logi).fl_csp.sp_features))
#define FNIC_LOGI_PORT_NAME(_logi) ((_logi).fl_wwpn)
#define FNIC_LOGI_NODE_NAME(_logi) ((_logi).fl_wwnn)

#define FNIC_LOGI_SET_RDF_SIZE(_logi, _rdf_size) \
	(FNIC_LOGI_RDF_SIZE(_logi) = cpu_to_be16(_rdf_size))
#define FNIC_LOGI_SET_E_D_TOV(_logi, _e_d_tov) \
	(FNIC_LOGI_E_D_TOV(_logi) = cpu_to_be32(_e_d_tov))
#define FNIC_LOGI_SET_R_A_TOV(_logi, _r_a_tov) \
	(FNIC_LOGI_R_A_TOV(_logi) = cpu_to_be32(_r_a_tov))

#define FNIC_STD_SET_S_ID(_fchdr, _sid)        memcpy((_fchdr).fh_s_id, _sid, 3)
#define FNIC_STD_SET_D_ID(_fchdr, _did)        memcpy((_fchdr).fh_d_id, _did, 3)
#define FNIC_STD_SET_OX_ID(_fchdr, _oxid)      ((_fchdr).fh_ox_id = cpu_to_be16(_oxid))
#define FNIC_STD_SET_RX_ID(_fchdr, _rxid)      ((_fchdr).fh_rx_id = cpu_to_be16(_rxid))

#define FNIC_STD_SET_R_CTL(_fchdr, _rctl)	((_fchdr).fh_r_ctl = _rctl)
#define FNIC_STD_SET_TYPE(_fchdr, _type)	((_fchdr).fh_type = _type)
#define FNIC_STD_SET_F_CTL(_fchdr, _fctl) \
	put_unaligned_be24(_fctl, &((_fchdr).fh_f_ctl))

#define FNIC_STD_SET_NPORT_NAME(_ptr, _wwpn)	put_unaligned_be64(_wwpn, _ptr)
#define FNIC_STD_SET_NODE_NAME(_ptr, _wwnn)	put_unaligned_be64(_wwnn, _ptr)
#define FNIC_STD_SET_PORT_ID(__req, __portid) \
	memcpy(__req.fr_fid.fp_fid, __portid, 3)
#define FNIC_STD_SET_PORT_NAME(_req, _pName) \
	(put_unaligned_be64(_pName, &_req.fr_wwn))

#define FNIC_STD_GET_OX_ID(_fchdr)		(be16_to_cpu((_fchdr)->fh_ox_id))
#define FNIC_STD_GET_RX_ID(_fchdr)		(be16_to_cpu((_fchdr)->fh_rx_id))
#define FNIC_STD_GET_S_ID(_fchdr)		((_fchdr)->fh_s_id)
#define FNIC_STD_GET_D_ID(_fchdr)		((_fchdr)->fh_d_id)
#define FNIC_STD_GET_TYPE(_fchdr)		((_fchdr)->fh_type)
#define FNIC_STD_GET_F_CTL(_fchdr)		((_fchdr)->fh_f_ctl)
#define FNIC_STD_GET_R_CTL(_fchdr)		((_fchdr)->fh_r_ctl)

#define FNIC_STD_GET_FC_CT_CMD(__fcct_hdr)  (be16_to_cpu(__fcct_hdr->ct_cmd))

#define FNIC_FCOE_MAX_FRAME_SZ  (2048)
#define FNIC_FCOE_MIN_FRAME_SZ  (280)
#define FNIC_FC_MAX_PAYLOAD_LEN (2048)
#define FNIC_MIN_DATA_FIELD_SIZE  (256)

#define FNIC_FC_EDTOV_NSEC    (0x400)
#define FNIC_NSEC_TO_MSEC     (0x1000000)
#define FCP_PRLI_FUNC_TARGET	(0x0010)

#define FNIC_FC_R_CTL_SOLICITED_DATA			(0x21)
#define FNIC_FC_F_CTL_LAST_END_SEQ				(0x98)
#define FNIC_FC_F_CTL_LAST_END_SEQ_INT			(0x99)
#define FNIC_FC_F_CTL_FIRST_LAST_SEQINIT		(0x29)
#define FNIC_FC_R_CTL_FC4_SCTL					(0x03)
#define FNIC_FC_CS_CTL							(0x00)

#define FNIC_FC_FRAME_UNSOLICITED(_fchdr)				\
		(_fchdr->fh_r_ctl == FC_RCTL_ELS_REQ)
#define FNIC_FC_FRAME_SOLICITED_DATA(_fchdr)			\
		(_fchdr->fh_r_ctl == FNIC_FC_R_CTL_SOLICITED_DATA)
#define FNIC_FC_FRAME_SOLICITED_CTRL_REPLY(_fchdr)		\
		(_fchdr->fh_r_ctl == FC_RCTL_ELS_REP)
#define FNIC_FC_FRAME_FCTL_LAST_END_SEQ(_fchdr)			\
		(_fchdr->fh_f_ctl[0] == FNIC_FC_F_CTL_LAST_END_SEQ)
#define FNIC_FC_FRAME_FCTL_LAST_END_SEQ_INT(_fchdr)		\
		(_fchdr->fh_f_ctl[0] == FNIC_FC_F_CTL_LAST_END_SEQ_INT)
#define FNIC_FC_FRAME_FCTL_FIRST_LAST_SEQINIT(_fchdr)	\
		(_fchdr->fh_f_ctl[0] == FNIC_FC_F_CTL_FIRST_LAST_SEQINIT)
#define FNIC_FC_FRAME_FC4_SCTL(_fchdr)					\
		(_fchdr->fh_r_ctl == FNIC_FC_R_CTL_FC4_SCTL)
#define FNIC_FC_FRAME_TYPE_BLS(_fchdr) (_fchdr->fh_type == FC_TYPE_BLS)
#define FNIC_FC_FRAME_TYPE_ELS(_fchdr) (_fchdr->fh_type == FC_TYPE_ELS)
#define FNIC_FC_FRAME_TYPE_FC_GS(_fchdr) (_fchdr->fh_type == FC_TYPE_CT)
#define FNIC_FC_FRAME_CS_CTL(_fchdr) (_fchdr->fh_cs_ctl == FNIC_FC_CS_CTL)

#define FNIC_FC_C3_RDF         (0xfff)
#define FNIC_FC_PLOGI_RSP_RDF(_plogi_rsp) \
	(min(_plogi_rsp->u.csp_plogi.b2b_rdf_size, \
	(_plogi_rsp->spc3[4] & FNIC_FC_C3_RDF)))
#define FNIC_FC_PLOGI_RSP_CONCUR_SEQ(_plogi_rsp) \
	(min((uint16_t) (be16_to_cpu(_plogi_rsp->els.fl_csp.sp_tot_seq)), \
	 (uint16_t) (be16_to_cpu(_plogi_rsp->els.fl_cssp[2].cp_con_seq) & 0xff)))

/* FLOGI/PLOGI struct */
struct fc_std_flogi {
	struct fc_frame_header fchdr;
	struct fc_els_flogi els;
} __packed;

struct fc_std_els_acc_rsp {
	struct fc_frame_header fchdr;
	struct fc_els_ls_acc acc;
} __packed;

struct fc_std_els_rjt_rsp {
	struct fc_frame_header fchdr;
	struct fc_els_ls_rjt rej;
} __packed;

struct fc_std_els_adisc {
	struct fc_frame_header fchdr;
	struct fc_els_adisc els;
} __packed;

struct fc_std_rls_acc {
	struct fc_frame_header fchdr;
	struct fc_els_rls_resp els;
} __packed;

struct fc_std_abts_ba_acc {
	struct fc_frame_header fchdr;
	struct fc_ba_acc acc;
} __packed;

struct fc_std_abts_ba_rjt {
	struct fc_frame_header fchdr;
	struct fc_ba_rjt rjt;
} __packed;

struct fc_std_els_prli {
	struct fc_frame_header fchdr;
	struct fc_els_prli els_prli;
	struct fc_els_spp sp;
}	 __packed;

struct fc_std_rpn_id {
	struct fc_frame_header fchdr;
	struct fc_ct_hdr fc_std_ct_hdr;
	struct fc_ns_rn_id rpn_id;
} __packed;

struct fc_std_fdmi_rhba {
	struct fc_frame_header fchdr;
	struct fc_ct_hdr fc_std_ct_hdr;
	struct fc_fdmi_rhba rhba;
} __packed;

struct fc_std_fdmi_rpa {
	struct fc_frame_header fchdr;
	struct fc_ct_hdr fc_std_ct_hdr;
	struct fc_fdmi_rpa rpa;
}	 __packed;

struct fc_std_rft_id {
	struct fc_frame_header fchdr;
	struct fc_ct_hdr fc_std_ct_hdr;
	struct fc_ns_rft_id rft_id;
} __packed;

struct fc_std_rff_id {
	struct fc_frame_header fchdr;
	struct fc_ct_hdr fc_std_ct_hdr;
	struct fc_ns_rff_id rff_id;
} __packed;

struct fc_std_gpn_ft {
	struct fc_frame_header fchdr;
	struct fc_ct_hdr fc_std_ct_hdr;
	struct fc_ns_gid_ft gpn_ft;
} __packed;

/* Accept CT_IU	for	GPN_FT	*/
struct fc_gpn_ft_rsp_iu {
	uint8_t		ctrl;
	uint8_t		fcid[3];
	uint32_t	rsvd;
	__be64		wwpn;
} __packed;

struct fc_std_rls {
	struct fc_frame_header fchdr;
	struct fc_els_rls els;
} __packed;

struct fc_std_scr {
	struct fc_frame_header fchdr;
	struct fc_els_scr scr;
} __packed;

struct fc_std_rscn {
	struct fc_frame_header fchdr;
	struct fc_els_rscn els;
} __packed;

struct fc_std_logo {
	struct fc_frame_header fchdr;
	struct fc_els_logo els;
} __packed;

#define	FNIC_ETH_FCOE_HDRS_OFFSET	\
	(sizeof(struct ethhdr) + sizeof(struct fcoe_hdr))

#endif	/*	_FDLS_FC_H	*/